Delta Geophysics Inc. is committed to providing our
clients with solutions to the criticalproblem of locating utilities and
reinforcing bar within poured concrete slabs.
Ground Penetrating Radar (GPR) technology is typically the methodology
of choice, and has replaced X-ray imaging because of health concerns and
accessibility issues. Concrete GPR can save on concrete cutting or coring
time, provide a safe working environment for personnel, and minimize equipment
and property damages.

OVERVIEW

Concrete GPR is a non-destructive and
non-invasive method, works fast, and is generally accepted as the industry
standard for most concrete investigation. Reliability is greatly improved
when experienced personnel use a high-frequency GPR antenna with maximum band
width. Even then success is not assured and should not be taken for
granted. This is because concrete is not homogeneous, and slabs contain
various objects such as rebar, metallic/non-metallic conduits, post-tension
cables and other embedded and overlapping features. As a result concrete
GPR is subject to shadowing and signal attenuation effects that can degrade
survey results.

Another difficulty in executing a floor scan is the size of the antenna. The size of most GPR antennas block access to small areas like closets and corners of rooms. Delta’s GPR equipment includes the latest GSSI 2000 MHz “Palm Antenna”.

This is one of the newest
instruments on the market and is capable of providing high-resolution data in
corners and close to walls, significantly improving the thoroughness of a
concrete scan.

Concrete mark-outs can never be
fool-proof, and are a great example of where reliance on inaccurate information
can be more harmful than having no information at all.

Concrete GPR
Applications:

Locate metallic/non-metallic conduits

Locate Rebar

Locate Post-Tension Cables

Locate Metal Studs

Locate Voids

Concrete Layer Thickness

Inspection of Walls, Floors and Columns

And More..

We feel the personal at Delta are
especially sensitive to the risks inherent in drilling a finished slab, and
have the knowledge and experience to communicate unique survey concerns to your
project manager at the jobsite. Please
contact us to determine if Concrete GPR will work for you.